In which, one man's dream to impart peace and tranquility throughout the universe leads to utter devastation of all there is, in one reality anyway.

Having accessed near-omnipotent energy from Galactus' homeship, the future-born criminal, Korvac had metamorphosed into a would-be modern-day messiah. His ambition drew the attention of Earth's Mightiest Heroes; the Avengers, but after an apocalyptic showdown they are completely annihilated.

Korvac systematically destroys his opponents, or bars them entrance to his earthly base of existence. He uses the reconstituted members of key Avengers to accomplish his ends. First target on Korvac's list is Earth's Watcher, Uatu. A hit-squad of the most powerful Avengers attack him at his home in the abandoned Kree city on the moon, but the Watcher escapes.

Uatu convenes a conglomerate of cosmic entities; Galactus, the Gardener and the Grandmaster among them. So threatening is the emergent power-scale of the usurper, Korvac, that it is agreed he must be halted immediately.

Other Avengers are resurrected for the benefit of their extra-sensory abilities to provide an early warning for Korvac, should any of the arrayed pantheon of Gods mount an assault on his battlements.

When indeed, that onslaught arrives, the stakes are increased exponentially. Wiping out planets, suns, galaxies. In effect: Ultimate Nullification.